Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Revenues:
Sales of marine technology products	$ 9,688,000	$ 12,105,000	$ 31,151,000	$ 31,819,000
Cost of sales:
Total cost of sales	5,175,000	6,684,000	16,478,000	17,402,000
Gross profit	4,513,000	5,421,000	14,673,000	14,417,000
Operating expenses:
Selling, general and administrative	3,021,000	2,762,000	10,042,000	8,305,000
Research and development	506,000	562,000	1,197,000	1,352,000
Depreciation and amortization	212,000	221,000	654,000	724,000
Total operating expenses	3,739,000	3,545,000	11,893,000	10,381,000
Operating income	774,000	1,876,000	2,780,000	4,036,000
Other income (expense):
Other, net	4,000	(189,000)	(79,000)	320,000
Total other income (expense)	4,000	(189,000)	(79,000)	320,000
Income before income taxes	778,000	1,687,000	2,701,000	4,356,000
Provision for income taxes	(716,000)	(396,000)	(1,680,000)	(1,313,000)
Net income	62,000	1,291,000	1,021,000	3,043,000
Preferred stock dividends - undeclared	0	(368,000)	0	(2,262,000)
Effect of preferred stock conversion	0	14,785,000	0	14,785,000
Net income attributable to common stockholders	$ 62,000	$ 15,708,000	$ 1,021,000	$ 15,566,000
Net income per common share - Basic and diluted (in dollars per share)	$ 0.01	$ 2.87	$ 0.13	$ 5.62
Shares used in computing net income per common share:
Basic and diluted (in shares)	8,046	5,473	7,980	2,772
Marine Technology Products [Member]
Cost of sales:
Total cost of sales	$ 5,175,000	$ 6,684,000	$ 16,478,000	$ 17,402,000